* diagnostic.c: Eliminate implicit int.
* except.c, gcc.c: Add static prototypes.
* final.c (final_end_function): Mark file arg ATTRIBUTE_UNUSED.
* gensupport.c (process_rtx): Use XVEC to initialize vector
slot of 'split'.
* print-rtl.c: If DEBUG_REGISTER_NAMES, define static
debug_reg_names instead of static reg_names. If not, define
global reg_names.
* regclass.c: Don't define global reg_names unless
DEBUG_REGISTER_NAMES is defined.
* reload1.c (order_regs_for_reload): Remove unused variable.
* varasm.c: Include output.h after defaults.h. Define
eh_frame_section as function of no args, not of unspecified args.
* gcc.c: Constify argbuf; arguments to store_arg,
process_command, main; elements of struct command and struct
switchstr; local variables in execute, process_command, main.